Glaresis zvirgzdinsi Warner, 1995

Gordon, Robert D. & Hanley, Guy A., 2014, Systematic revision of American Glaresidae (Coleoptera: Scarabaeoidea), Insecta Mundi 2014 (333), pp. 1-91 : 22-23

Glaresis zvirgzdinsi Warner

Glaresis zvirgzdinsi Warner 1995: 267 .

Description. Male. Length 3.7 mm, width 2.0 mm; body form compact, widened from elytral base to apical 1/3 ( Fig. 13A ). Color pale brownish yellow. Head with clypeal surface smooth, shiny, with distinct, coarse, sparse tubercles extended onto frons, frons densely rugose, vertex finely reticulate without basal carina, setae short, indistinct. Clypeal apex slightly raised, weakly sinuate with median emargination, lateral angles oblique, angulate ( Fig. 13B ). Mandible pair symmetrical; mesal tooth strong; lateral prominence weak, outer margin rounded. Pronotum with distinct, long, transverse fovea in anterior 1/4 extended completely across pronotum, small slightly transverse fovea on each side of middle in anterior 1/ 2, wide, deep fovea on each side medially near lateral margin, distinct central furrow extended from base to transverse furrow; surface finely rugose, with sparse, straight setae-bearing carinae, setae decumbent, about 1/2 length of carina; anterior and lateral pronotal margins not bordered, lateral and basal margins crenulate ( Fig. 13C ). Elytra with surface dull, finely microreticulate; all striae slightly convex, nearly flat, not carinate, remnants of carinae reduced to setal bases, seta twice as long as base; intervals with large, shallow, slightly rectangular punctures ( Fig. 13E ). Metasternum long, dull, finely, densely microreticulate, median surface without ridges, laterally with numerous, obliquely straight ridges throughout, median area flat, with median carina extended anteriorly from apical keel 1/2 or more distance to mesocoxae ( Fig. 13D ); metasternal groove nearly invisible. Lateral protibial teeth unevenly spaced, basal 2 teeth closer together. Mesotibia with 6 spines laterally, spinal bases close together, tibia slightly projecting at apex ( Fig. 13D ). Posterior metatrochanteral margin without teeth; posterosuperior surface of metatrochanter with single large tooth near femur ( Fig. 13H ). Metafemoral surface with widely, evenly spaced setae-bearing tubercles, microreticulate; width to length ratio 1.0:1.5, with narrow flange on anterior margin; posterior metafemoral margin angulate next to trochanter; posterosuperior margin with 2 small teeth very close together ( Fig. 13H ). Metatibia broadly triangular, surface entirely microreticulate, with large, shelflike ridge about as wide as 1/2 metatibial width on outer margin postmedially, with large teeth on outer margin from near base to postmedian projection, an irregular row of 5 coarse tubercles extended from base nearly to apex medially, inner margin smooth, pubescent ( Fig. 13G ). Apical margin of 5th abdominal ventrite weakly rounded. Genitalia long, wide, basal piece longer than parameres, proximal end curved; median lobe shorter than parameres, tapered from base to apex, slightly narrower at middle than a paramere, curved upward in apical 1/3, apex rounded in ventral view; parameres slightly curved before apex in lateral view, margin straight, apex narrowly rounded ( Fig. 13F ).

Female. Apex of 5th abdominal ventrite strongly rounded.

Variation. Length 3.0 to 4.4 mm, width 1.7 to 2.3 mm. Lateral mesotibial spine number varies from 5 to 7.

Type locality. Arizona, Yuma Co., north end of Mohawk dunes west of Mohawk Mountains, ca. 1 mi. S of I-8.

Type depository. ( FSCA).

Temporal distribution. April-May.

Geographical distribution. UNITED STATES. Arizona: Yuma Co., north end of Mohawk dunes west of Mohawk Mountains, ca. 1 mi. S of I-8; Yuma; Yuma Co., 6-8 mi. E. of Tacna dunes. Baja California: 36 mi. S. La Puerta. ( CMNC) ( FSCA) ( RCCC) ( USNM) ( WBWC).

Remarks. Glaresis zvirgzdinsi and G. arenata are similar species with similar ranges. Glaresis zvirgzdinsi differs from G. arenata by larger size; smooth, shiny clypeal surface; and posterosuperior metafemoral margin with 2 closely spaced teeth ( G. arenata has these teeth widely separated). In addition, the lateral mesotibial margin usually has 4 spines, sometimes 5 in G. arenata , G. zvirgdinsi usually has 6 spines.

Figures

Figures 13A-13H. Glaresis zvirgzdinsi Warner. A) Habitus view. B) Clypeus and head surface. C) Pronotal surface. D) Metasternum and mesotibia. E) Elytral striae. F) Male genitalia. G) Metaleg and trochanter, dorsal view. H) Metaleg and trochanter, ventral view.